Ziegler's sister, Jackie, says the two friends were headed to Myrtle Beach and the last phone call from the pair came in around 3 a.m. Saturday from the Rock Hill area.

"There is no activity on their cellphones, on their debit cards. We don't believe they have any cash with them. They have one Shell card for gas and they can use it for food. However, I can't trace it until Monday morning," reported Jackie Ziegler.

Family and friends plan to drive down Interstate 77 to Columbia Monday morning to see if they can locate the car the teens were driving. Ziegler says they are looking for a 2006 Green Pontiac G-6 with NC plates BBD-8844.

If you see the teens, or the vehicle they are reportedly driving, please call Myrtle Beach police at 843-918-1300.